5. Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

The following tables sets summarize the Company’s financial assets and liabilities, measured at fair value on a recurring basis by level within the fair value hierarchy, as of December 31, 2022, and 2021, (in thousands):

	Fair Value Measurements at December 31, 2022 using:
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	4,300	$	-	$	-	$	4,300
Available-for-sale securities:
U.S. Treasury bills		2,049		-		-		2,049
	$	6,349	$	-	$	-	$	6,349

	Fair Value Measurements at December 31, 2021 using:
	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	14,997	$	-	$	-	$	14,997
	$	14,997	$	-	$	-	$	14,997

Schedule of Changes in Fair value of Derivative Liability

The change in the fair value of the derivative liability is summarized below (in thousands):

	Years Ended December 31,
	2022		2021
Fair value, beginning of period	$	-	$	856
Initial fair value of instruments issued		-		363
Change in fair value of instruments		-		(118	)
Conversion upon IPO		-		(1,101	)
Fair value, end of period	$	-	$	-